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掺杂Sm2O3的向列相液晶TEB30A光栅衍射特性研究
Diffraction characteristics of nematic liquid crystal TEB 30 A grating doped with Sm2O3
- 液晶与显示 2018年33卷第10期 页码：851-856
- 作者机构：
内蒙古科技大学 包头师范学院, 内蒙古 包头 014030
- 作者简介：
[ "刘桂香(1968-), 女, 满族, 内蒙古赤峰人, 硕士, 教授, 2007年于宁波大学获硕士学位, 主要从事液晶材料光学性质研究。E-mail:gxliuemail@126.com" ]
[ "王雁冰(1966-), 男, 汉族, 内蒙古包头人, 学士, 高级实验师, 2005年于北京交通大学获学士学位, 主要从事光学方向研究。E-mail:Wangbing13947@sina.com" ]
- 基金信息：国家自然基金(1176050057);内蒙古教育厅科学研究项目(JZW-16-RT-02);阴山学者培养计划(01135005/043);National Natural Science Foundation of China(1176050057);Scientific Research Project of the Inner Mongolia Education Office(JZW-16-RT-02);Yinshan Scholar Training Plan(01135005/043)
DOI：10.3788/YJYXS20183310.0851
中图分类号： O484.41收稿日期：2018-04-05，
录用日期：2018-6-14，
纸质出版日期：2018-10-05
- 稿件说明：
移动端阅览
刘桂香, 林海, 庞伟秀, 等. 掺杂Sm2O3的向列相液晶TEB30A光栅衍射特性研究[J]. 液晶与显示, 2018,33(10):851-856.
Gui-xing LIU, Hai LIN, Wei-xiu PANG, et al. Diffraction characteristics of nematic liquid crystal TEB 30 A grating doped with Sm2O3[J]. Chinese journal of liquid crystals and displays, 2018, 33(10): 851-856.
刘桂香, 林海, 庞伟秀, 等. 掺杂Sm2O3的向列相液晶TEB30A光栅衍射特性研究[J]. 液晶与显示, 2018,33(10):851-856. DOI： 10.3788/YJYXS20183310.0851.
Gui-xing LIU, Hai LIN, Wei-xiu PANG, et al. Diffraction characteristics of nematic liquid crystal TEB 30 A grating doped with Sm2O3[J]. Chinese journal of liquid crystals and displays, 2018, 33(10): 851-856. DOI： 10.3788/YJYXS20183310.0851.
摘要
基于光学琼斯矩阵理论，研究掺杂Sm
2
O
3
的向列相液晶TEB30A在弱磁场中的光栅衍射特性。结果表明，自然光通过处在弱磁场中的适量配比的Sm
2
O
3
/TEB30A样品后，会在远场产生衍射条纹，且衍射条纹会随外磁场强度的增加而出现动态的变化。产生衍射条纹是由于适量的Sm
2
O
3
的掺杂，使得向列相液晶TEB30A的折射率各向异性Δ
n
沿外磁场方向呈现周期分布，形成了液晶光栅；当外磁场强度发生变化时，处在外磁场中的Sm
2
O
3
粒子和液晶分子的分布会随之发生变化，导致Δ
n
沿外磁场分布的周期发生变化，从而引起液晶光栅常数发生变化，因此，衍射条纹呈现出动态变化的效应。模拟结果表明，当外磁场强度由0.464 9 T增加到0.518 5 T时，液晶光栅常数由0.5 cm降到0.4 cm。这一技术研究方法将大大降低液晶光栅的成本，同时，弱磁场环境也为使用者提供了一种安全的使用环境。
Abstract
Based on the theory of the optical Jones matrix
the grating diffraction of the nematic liquid crystal TEB30A doped with Sm
2
O
3
is studied in the weak magnetic field. The results show that when the natural light passes through the sample of the proper proportion of Sm
2
O
3
/TEB30A in the weak magnetic field
the diffraction stripes appear in the far field. And the diffraction stripes will change dynamically with the increase of the intensity of the external magnetic field. The reason for producing the diffraction stripes is that the proper Sm
2
O
3
particles make the refractive index anisotropy Δ
n
of the nematic liquid crystal TEB30A exhibit the periodic distribution along the direction of the external magnetic field
which leads to the formation of the grating in the liquid crystal. When the external magnetic field varies in the intensity
the distribution of Sm
2
O
3
particles and liquid crystal molecules in the external magnetic field will change accordingly
which causes the period of the distribution of Δ
n
along the external magnetic field to change. As a result
the constant of the liquid crystal grating changes. Therefore
the diffraction stripes exhibit a dynamic effect. The simulation results show that the grating constant of the Sm
2
O
3
-doped nematic liquid crystal TEB30A decreases from 0.5 cm to 0.4 cm with the magnetic strength increasing from 0.464 9 T to 0.518 5 T. The technical method will greatly reduce the costs of the liquid crystal grating
and make operator work in a safe setting.
关键词
Keywords
references
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